NAME

       Eruption - eruption of pieces of hot volcanic rock

SYNOPSIS

       Eruption [-display host:display.screen] [-visual visual] [-window] [-root] [-ncolors number] [-nParticles
       number] [-Heat number] [-Cooling number] [-Gravity number] [-delay number] [-cycles number] [-fps]

DESCRIPTION

       This  hack  creates  an eruption of pieces of hot volcanic rock.  Ported from the demo effects collection
       (http://demo-effects.sourceforge.net)

OPTIONS

       -visual visual
               Specify which visual to use.  Legal values are the name of a  visual  class,  or  the  id  number
               (decimal or hex) of a specific visual.

       -window Draw on a newly-created window.  This is the default.

       -root   Draw on the root window.

       -ncolors number
               Number of Colors.  Default: 256.

       -particles number
               Number of Particles. Default: 300.

       -cooloff number
               Eruption Cooloff. Default: 2.

       -heat number
               Heat of Eruption. Default: 256.

       -gravity number
               Gravity. Default: 1.

       -delay number
               Per-frame delay, in microseconds.  Default: 5000 (0.01 seconds.).

       -cycles number
               Duration.  10 - 3000.  Default: 80.

       -fps    Display the current frame rate and CPU load.

ENVIRONMENT

       DISPLAY to get the default host and display number.

       XENVIRONMENT
               to  get  the  name  of  a  resource  file  that  overrides  the  global  resources  stored in the
               RESOURCE_MANAGER property.

SEE ALSO

       X(1), xscreensaver(1)

COPYRIGHT

       Copyright © 2002-2003 by W.P. van Paassen.  Permission to use, copy, modify, distribute,  and  sell  this
       software  and  its  documentation  for any purpose is hereby granted without fee, provided that the above
       copyright notice appear in all copies and that both that copyright  notice  and  this  permission  notice
       appear  in  supporting  documentation.   No  representations  are made about the      suitability of this
       software for any purpose.  It is provided "as is" without express or implied warranty.

AUTHOR

       W.P. van Paassen

X Version 11                                   5.45 (08-Dec-2020)                                   eruption(6x)